package org.guys.magic.util;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

/**
 * 属性文件工具类
 */
public final class PropsUtil {

    private static final Logger LOGGER = LoggerFactory.getLogger(PropsUtil.class);

    /**
     * 加载属性文件
     * @param fileName
     * @return
     */
    public static Properties loadProps(String fileName){
        Properties properties = null;
        InputStream inputStream = null;
        try {
            inputStream = Thread.currentThread().getContextClassLoader().getResourceAsStream(fileName);
            if (inputStream == null){
                throw new FileNotFoundException(fileName+"file is not found");
            }
            properties = new Properties();
            properties.load(inputStream);
        }catch (IOException e){
            LOGGER.error("load properties file failure",e);
        }finally {
            if (inputStream!=null){
                try {
                    inputStream.close();
                }catch (IOException e){
                    LOGGER.error("close input stream failure",e);
                }
            }
        }
        return properties;
    }

    /**
     * 获取字符型的属性（默认值为空）
     * @param properties
     * @param key
     * @return
     */
    public static String getString(Properties properties,String key){
        return getString(properties,key,"");
    }

    /**
     * 获取字符型的属性，可以指定默认值
     * @param properties
     * @param key
     * @param defaultValue
     * @return
     */
    public static String getString(Properties properties,String key,String defaultValue){
        String value = defaultValue;
        if(properties.containsKey(key)){
            value = properties.getProperty(key);
        }
        return value;
    }

    /**
     * 获取数值型的属性，默认值为0
     * @param properties
     * @param key
     */
    public static int getInt(Properties properties,String key){
        return getInt(properties,key,0);
    }

    /**
     * 获取数值型的属性，可以指定默认值
     * @param properties
     * @param key
     * @param defaultValue
     * @return
     */
    public static int getInt(Properties properties,String key,int defaultValue){
        int value =defaultValue;
        if(properties.containsKey(key)){
            value = CastUtil.castInt(getString(properties,key));
        }
        return value;
    }

    /**
     * 获取数值型的属性，默认值为false
     * @param properties
     * @param key
     * @return
     */
    public static boolean getBool(Properties properties,String key){
        return getBool(properties,key,false);
    }

    /**
     * 获取布尔型的属性，可以指定默认值
     * @param properties
     * @param key
     * @param defaultValue
     * @return
     */
    public static boolean getBool(Properties properties,String key,boolean defaultValue){
        boolean value = defaultValue;
        if(properties.containsKey(key)){
            value = CastUtil.castBoolean(getString(properties,key));
        }
        return value;
    }
}
